The unit sample sequence In words, the unit sample sequence is a signal that is zero everywhere except at n=0 where its value is unity. This signal is sometimes referred to as a unit impulse. N=13; ...

n=-20:20; % The colon operator (first:last) generates a 1-by-n matrix (or vector) of sequential numbers % from the first value to the last. % The default sequence is made up of incremental values, ...